I also posted this at !networking@sh.itjust.works and someone told me about this community.
I've had Frontier fiber internet for the past 2-ish years. No complaints at all, but the nerd in me desires IPv6. I have the Frontier provided ONT device but declined their router. I have a MikroTik RB5009 which has been "searching" for an IPv6 prefix.
Anyway, I found this link during my research some time ago, and it finally looks like Frontier is enabling IPv6 for people.
I'm still not sure I'll be able to get it until I get the settings just right, but thought I'd share.